The challenges in well construction have been increasing over time, sometimes by increasing the technical difficulties due to the greater complexity of the areas to be developed, sometimes by the improvements in the rules of regulatory agencies to increase security. There are two pillars that should guide the project of a petroleum well: safety and productivity. The equipment called Subsurface Safety Valve and its control system can be considered important for both pillars, because if the system fails resulting in a premature well closure, it will directly affect the production. On the other hand, if the failure occurs in an attempt to closing it, may influence the consequence of a disaster, which would affect both people and the environment. The objective of this study is to compare the reliability of some control systems models taking into account the equipment positions throughout the system and their failure rates. Furthermore, most reliable studies conducted in this area has mainly focused on safety, but this study has a focus on production efficiency, and the analysis will be based on comparisons between some configurations available for subsurface safety valves control system, including serial and parallel components, using the model of Markov reliability analysis.